There are many different ways to style code with GitHub's markdown. If you have inline code blocks, wrap them in backticks: var example = true. If you've got a longer block of code, you can indent with four spaces:

if (isAwesome){
return true
}

GitHub also supports something called code fencing, which allows for multiple lines without indentation:

if (isAwesome){
return true
}

And if you'd like to use syntax highlighting, include the language:

if(isAwesome){returntrue}

GitHub supports many extras in Markdown that help you reference and link to people. If you ever want to direct a comment at someone, you can prefix their name with an @ symbol: Hey @kneath — love your sweater!

But I have to admit, tasks lists are my favorite:

[x] This is a complete item

[ ] This is an incomplete item

When you include a task list in the first comment of an Issue, you will see a helpful progress bar in your list of issues. It works in Pull Requests, too!